Finally, we use the additive welfare function (REF ) (refered to as welf) with the recommended values \(\alpha _1\in \lbrace -2,0,1\rbrace \)  and \(\alpha _2=0\)  [1]}, and varying \(\lambda \in (0,1)\)  as third baseline. We only report the result of \(\alpha _1=1\)  since it obtained overall better performances on this task.
